TypeScript Advanced Types

Iron Law: Before applying any type pattern, READ the actual TypeScript file first. Do not suggest type changes from memory — verify the actual code (file:line) before making any claim.

When to Use

• Building type-safe libraries or frameworks
• Creating reusable generic components
• Implementing complex type inference logic
• Designing type-safe API clients
• Building form validation systems
• Creating strongly-typed configuration objects
• Implementing type-safe state management
• Migrating JavaScript codebases to TypeScript

Do Not Use

• The task is unrelated to TypeScript advanced types
• You need a different domain or tool outside this scope (Flutter/Dart, Java, Python)